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https://github.com/xushaohua/nc
Run *nix system calls directly in Rust
https://github.com/xushaohua/nc
rust syscalls
Last synced: 1 day ago
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Run *nix system calls directly in Rust
- Host: GitHub
- URL: https://github.com/xushaohua/nc
- Owner: XuShaohua
- License: apache-2.0
- Created: 2019-05-17T02:35:23.000Z (over 5 years ago)
- Default Branch: main
- Last Pushed: 2024-10-18T08:54:50.000Z (3 months ago)
- Last Synced: 2024-10-20T07:58:35.093Z (3 months ago)
- Topics: rust, syscalls
- Language: Rust
- Homepage:
- Size: 4.91 MB
- Stars: 55
- Watchers: 2
- Forks: 12
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# nc
[](https://crates.io/crates/nc)
[](https://docs.rs/nc)
Access system calls directly without `std` or `libc`.
- [Documentation](https://docs.rs/nc)
- [Release notes](https://github.com/xushaohua/nc/tags)
Features:
- No glibc or musl required
- Access syscalls directly, via assembly
- No global errno variable, every function returns an errno instead
- Support latest kernel APIs, like io-uring and pidfd, introduced in linux 5.0+
## Usage
Add this to `Cargo.toml`:
```toml
[dependencies]
nc = "0.9"
```
## Examples
Get file stat:
```rust
let mut statbuf = nc::stat_t::default();
match unsafe { nc::stat("/etc/passwd", &mut statbuf) } {
Ok(_) => println!("s: {:?}", statbuf),
Err(errno) => eprintln!("Failed to get file status, got errno: {}", errno),
}
```
Get human-readable error string:
```rust
let errno = nc::EPERM;
println!("err: {:?}", nc::strerror(errno);
```
Fork process:
```rust
let pid = unsafe { nc::fork() };
match pid {
Err(errno) => eprintln!("Failed to call fork(), err: {}", nc::strerror(errno)),
Ok(0) => {
// Child process
println!("[child] pid: {}", unsafe { nc::getpid() });
let args = ["ls", "-l", "-a"];
let env = ["DISPLAY=wayland"];
let ret = unsafe { nc::execve("/bin/ls", &args, &env) };
assert!(ret.is_ok());
}
Ok(child_pid) => {
// Parent process
println!("[main] child pid is: {child_pid}");
}
}
```
Kill self:
```rust
let pid = unsafe { nc::getpid() };
let ret = unsafe { nc::kill(pid, nc::SIGTERM) };
// Never reach here.
println!("ret: {:?}", ret);
```
Or handle signals:
```rust
fn handle_alarm(signum: i32) {
assert_eq!(signum, nc::SIGALRM);
}
fn main() {
let sa = nc::new_sigaction(handle_alarm);
let ret = unsafe { nc::rt_sigaction(nc::SIGALRM, Some(&sa), None) };
assert!(ret.is_ok());
let remaining = unsafe { nc::alarm(1) };
let mask = nc::sigset_t::default();
let ret = unsafe { nc::rt_sigsuspend(&mask) };
assert!(ret.is_err());
assert_eq!(ret, Err(nc::EINTR));
assert_eq!(remaining, Ok(0));
}
```
## Supported Operating Systems and Architectures
- linux
- aarch64
- arm
- loongarch64
- mips
- mips64
- mips64el
- mipsel
- powerpc64
- powerpc64el
- riscv64
- s390x
- x86
- x86-64
- android
- aarch64
- freebsd
- x86-64
- netbsd
- x86-64
- mac os
- x86-64
## Related projects
- [nix](https://github.com/nix-rust/nix)
- [relibc](https://gitlab.redox-os.org/redox-os/relibc.git)
- [Linux Syscall Support](https://chromium.googlesource.com/linux-syscall-support)
- [syscall pkg in golang](https://github.com/golang/go/tree/master/src/syscall)
## License
This library is govered by [Apache-2.0 License](LICENSE).